I have always thought I could...but, I was chatting with Roger Ormon, the famous wine Guru of Brookline, and he was telling me that in his 30 years experience tasting hundreds of both he could not tell the difference blind, and that in his honest opinion, no one not from one of the nearby villages really could...

They are both unoaked Sauvignon Blanc. Not only could we not tell them apart blind, but would have a hard time telling either of them with many New Zealand SBs. Can easily tell them from most Australian and Californian SBs.

I agree that Sancere and Pouilly Fume are very, very, very, very, close, but disagree about New Zealand SB's. Have found them to be quite easy to pick out from the French, Californian, and Washington's.